Customer Interviews vs. Surveys: Which One Do You Actually Need?

Most teams use customer interviews and surveys interchangeably. They're not the same tool.

Interviews are for depth. Surveys are for scale.

If you're trying to understand why something is happening, you need to talk to people.

Because customers will tell you things you didn't think to ask. They'll contradict your assumptions. They'll describe problems in their own words, not your categories.

A founder was convinced customers wanted a new scent line. She was ready to launch. Interviews stopped her. Customers loved the brand but kept saying the same thing: too many products, too hard to choose. No survey would have surfaced that. She wasn't asking the right question yet.

But interviews can't tell you how common something is.

That's where surveys come in.

Once you've heard the patterns, surveys answer the harder question: is this worth solving?

She surveyed 200 customers. 70% said they were overwhelmed by current choices. Not a perfect sample. But a clear enough signal.

She didn't launch the new line. She simplified the existing one. AOV went up.

Interviews give you the story. Surveys tell you how many people are living it.